Contact device



C. CIPPITELLI CONTACT DEVICE March 14, 1933.

Filed Jan. 6, l1531 2 sheetssheet 2 m v. a

Fig 8- Patented Mar. 1.4, 1933 UNITED STATES PATENT OFFICE GIPPITELLI, 0F FRANKFORT-ON-THE-HAJIT, GERMANY, .ASSIGNOR T0 FIRM VOIGT & HAITFNER A.. G., 0F FBANKFORT-ON-THE-mm, GERMANY CONTACT DEVIGE Application med January 6, 1931, Serial No.

This invention relates' to an electrical contact device consisting of a contact pin and a contact sleeve which is formed of contact ngers or stampings bent at an angle and arranged concentrically about the contact pin, one behind another. According to the invention the contact lingers or stampings of the' contact sleeve have at the middle part a web-like extension with a large and a small curved out part and are arranged one after another, the curved part of one contact finger or metal stamping having the smaller diameter being inserted in the curved part having the larger diameter of the tact finger.

Some constructional examples of the invention are illustrated in the accompanying drawings.

n Fig. l a single contact nger o r metal stamping is illustrated in side elevation..

Fig. 2 is an end elevation of Fig. 1,

Fig. 3 shows schematically the assembly of a part of the metal stampings forming the contact sleeve in a plan view. y

Figs. 4 and 5 are two elevations at right angles partly in section of a contact device which is intended especially for use at the end contact lof a sliding disconnecting switch,.

Figs. 6 and 7 show two elevations at right angles partly in section of a contact device which is intended for a contact pin passing through it,

Fig. 8 is an elevation of a contact device which can be used as a sliding disconnecting switch for open air plants.

lfn Fig. 9 the same device' is shown in the od position.

Fig. l() shows a part of a contact finger or metal stamping on a large scale.

According to Figs. 1-3 the angularly bent contact fingers or stampings l, which form the contact sleeve are provided at their middle parts with web-like extensions which have larger curved out parts la and smaller curved out parts 1b. The V-shaped resilient contact fingers and their web-like extension with recesses are Jformed from single pieces of sheet metal. The smaller recess 1b of each contact nger 1 is inserted in the larger next con- 507,082, and in Germany January 21, 1930.

yrecess 1a of the next contact finger. The present device is distinguished from other contact devices which have contact sleeves formed by angularly bent or V-shaped contact fingers by the fact that it enables a simple putting together or assembly of the separate contact fingers. rTongues 1c are provided at each end of the larger recess la o the contact finger 1. The tongues 1c are bent sideways as shown in Figure 3 after' the contact fingers or metal stampings have been put together and consequently prevent' the contact iingers being displaced in the direction of the longitudinal axis of the contact pin. The same effect could also be obtained by other bent tongues. The contact sleeve is preferably placed in a second protective sleeve or housing which is indicated in Fig. 3, by the arc 4:. n this figure the contact pin is not shown. The contact is made with the free ends of the V-shape'd contact ngers, i. e. the ends opposite the protective sleeve or housing 2.

The contact sleeves which are used in the constructional examples according to Figs. 4 9, correspond to those of Figs. 1-5 and in the rst mentioned figures are only shown diagrammatically on account of the great simplicity.

According to F igs.I 4 and 5, the contact sleeve formed .of the li-shaped contact ngers l is set in a cup-like metal housing d pressed out of one piece. @ne side of the metal housing 4c is bent over to form. a securing ange 4a and a tongue 4c is pressed out of its bottom 4?), so that on the one hand a second securing Bange and on the other an opening 5 for introducing the contact pin, are formed. The -protective metal 'housing 4 is secured to the angle piece 6 of rectangular cross section for the contactpin 9. In the constructional examples according to Figs. 4-"7 the provision of laterally bent tonguesy is unnecessary because the displacement of the contact pieces in the direction of the longitudinal axis of the contact pin is prevented by the construction of the housing encircling the contact sleeve.

The contact device according to Figs. 8 and 9 consists of two contact sleeves 10a, 10b, formed of vV-shaped contact fingers. The contact sleeve 10a is mounted in a stationary cup-like protective sleeve or housing 11a, which has a tubular extension 12 closed atthe top. The second contact sleeve 10b is mounted in a movable cup-like protecting sleevev or housing 11b, the upper part of which carries the contact pin 13, which is guided in the contact sleeve 10a. The contact sleeve 10b and the protective contact sleeve 11b are slidable on a stationary contact pin 14. The ends of the current circuit to be controlled by the contact device are attached to the stationary contact pin 14 and to the terminal bolt 14a, respectively which is provided on the upper side of the tubular extension 12.v The tubular extension 12 and the contact pin 14 are secured to the base plate 15 by insulating supports 7 On this plate a third insulating support 7 is pivotally connected by the axle 16. This support is jointed to the protective sleeve or housing 11b by means of a link 17.

If the insulating support which is rotatable about the axle 16 is ushed downwards,

'as shown in Fig. 8, the circuit controlled by the contact device is closed. The circuit in the contact device is as follows The stationary contact pin 14, movable contact contact sleeve 10b, protective housing 11b, contact pin 13, contact sleeve 10a, protective housing 11a, tubular extension piece 12, terminal bolt 14a. When the middle insulating support 7 is turned upwards about the axle 16, the current circuit is invterrupted between the stationary contact pin 14 and the movable contact sleeve 10b. In interrupting the circuit, the contact pin 13 slides in the tubular extension piece 12 and takes the position as shownin Fig. 9.

The constructional example according to Figures 8 and 9 is particularly suitable for a disconnecting switch for cpen air plants as securing the contact pieces from moisture and may also be provided with other contact sleeves than those according to Figs. 1-3.

What I claim is 1. An electrical contact device comprising a contact pin, a plurality of contact fingers bent at an angle and disposed one after another around the contact pin to form a contact sleeve, each contact finger having a web-like extension at its middle part with a large and a small curved out part, the

Y smaller curved out part of each contact finlike extension at its middle part with a large and a small curved out part, the contact fingers being dis osed around the contact pin with the smal er curved out part of each contact finger fitting in the larger curved out part vof the next contact finger, so as to form a contact sleeve, a cup-like housing pressed from a piece of metal which surrounds the Contact sleeve, a securing flange on the side of said housing, and a tongue pressed out of the bottom of said housing forming a second securing iiange and leaving an opening adapted for the passage of said contact pin.

4. An electrical contact device comprising a contact pin, a plurality of substantially V-shaped contact fingers each having a weblike extension at its middle part with a large 1 and a small curved out part, the contact fingers being disposed around the contact pin with the smaller curved out part of each contact iin er fitting in the larger curved out part o the next contact finger, so as to form a contact sleeve, la protective sleeve surrounding the contact sleeve with openings at each end and guiding plates of rectangular cross section for the contact pin which are adapted to close the ends of said protective sleeve.

5. An electric contact device comprising two contact sleeves each one formed of a plurality of contact fingers bent at an angle and disposed after one another circularly to form said contact sleeves, protective sleeves surrounding said contact sleeves, one of said contact sleeves being arranged stationary and the other contact sleeve being movable,

the protective sleeve of said stationary contact sleeve being provided with a tubular eX- tension, a contact pin inserted in said stationary contact sleeve and tubular extension, said contact pin being carried by the protective sleeve of the movable contact sleeve and a second contact pin arranged stationary and cooperating with said movable contact sleeve.

6. An electric contact device comprising two contact sleeves each one formed of a plurality of contact stampings bent at an angle and disposed after one another circularly to form said contact sleeves, each contact stamping having a Web-like extension at its middle part with a large and a.I small maaar? curved outpart, the smaller curved out part of each contact stamping being mserted iny the larger curved .out part of the next contact stamping, protective sleeves surrounding said two contact sleeves, one of said contact sleeves being stationary and carried by an insulating support and the other Contact sleeve being movable and carried by a second insulating support being pivoted on a base, the protective sleeve of said stationary con-` tact sleeve being provided with a tubular extension, said pin being carried by the protective sleeve of the movable contact sleeve form a ci'ontact sleeve, and tongues bent over laterally on the contact fingers adapted to prevent displacement of the contact fingers in the direction 'of the longitudinal axis ot the contact pin.

8. An electrical contact device comprising a plurality 'of' contact stampings each bent nat an angle and' each having a large and a small curved out part, the smaller curved out part of each contact stamping bein inserted in the larger curved out part o the Vnext contact stamping, and the contact stampings being arranged circularly to .form a contact sleeve and a contact pin adapted to be inserted in the centre of the contact sleeve so asto make electrical contact with the contact. stampings forming the contact sleeve.

9. An electric contact device comprising aplurality of substantially V-shaped resilient contact fingers, each contact iin er having a web-like extension at is mid e part, said contact fingers being loosely connected with each other by means of said web-like extension and arranged circularl to form' a contact sleeve, and a contact pm adapted to be inserted in the centre of said contact sleeve so as to make electrical contact with the radial inner ends of said contact fingers;

In testimony whereof I have signed my name to this specification.

CESARE CIPPITELLI. 

